1. Find Java-related lists
[root@localhost ~]# yum-y list java*
Loaded Plugins:fastestmirror, Refresh-packagekit, security
Loading mirror speeds from cached hostfile
2. Install using the root user
The installation reminder must use the root user and sudo will not work.
[root@localhost ~]# yum-y Install java-1.7.0-openjdk*
Loaded Plugins:fastestmirror, Refresh-packagekit, security
Loading mirror speeds from cached hostfile
Dependencies resolved
================================================================================
Package Arch Version Repository
Size
================================================================================
Installing:
JAVA-1.7.0-OPENJDK x86_64 1:1.7.0.79-2.5.5.1.el6_6 Updates M
Java-1.7.0-openjdk-demo x86_64 1:1.7.0.79-2.5.5.1.el6_6 Updates 1.9 M
Java-1.7.0-openjdk-devel x86_64 1:1.7.0.79-2.5.5.1.el6_6 Updates 9.4 M
Java-1.7.0-openjdk-javadoc noarch 1:1.7.0.79-2.5.5.1.el6_6 Updates M
JAVA-1.7.0-OPENJDK-SRC x86_64 1:1.7.0.79-2.5.5.1.el6_6 Updates M
Libjpeg-turbo x86_64 1.2.1-3.el6_5 Base 174 k
Transaction Summaryreplacing libjpeg.x86_64 6b-46.el6
Install 6 Package (s)
Total Download size:92 M
Downloading Packages:
(1/6): java-1.7.0-openjdk-1.7.0.79-2.5.5.1.el6_6.x86_64. | MB 02:44
(2/6): java-1.7.0-openjdk-demo-1.7.0.79-2.5.5.1.el6_6.x8 | 1.9 MB 00:10
(3/6): java-1.7.0-openjdk-devel-1.7.0.79-2.5.5.1.el6_6.x | 9.4 MB 01:23
(4/6): Java-1.7.0-openjdk-javadoc-1.7.0.79-2.5.5.1.el6_6 | MB 02:16
(5/6): java-1.7.0-openjdk-src-1.7.0.79-2.5.5.1.el6_6.x86 | (MB) 04:23
Total 143 kb/s | MB 11:03
Warning:rpmts_HdrFromFdno:Header V3 rsa/sha1 Signature, key ID C105b9de:nokey
Retrieving Key from File:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6
Importing GPG key 0xc105b9de:
Userid:centos-6 Key (CentOS 6 official Signing Key)[email protected]
Package:centos-release-6-3.el6.centos.9.x86_64 (@base/$releasever)
From:/etc/pki/rpm-gpg/rpm-gpg-key-centos-6
Running Rpm_check_debug
Running Transaction Test
Transaction Test Succeeded
Running Transaction
Installing:libjpeg-turbo-1.2.1-3.el6_5.x86_64 1/7
Installing:1:java-1.7.0-openjdk-1.7.0.79-2.5.5.1.el6_6.x86_64 2/7
Installing:1:java-1.7.0-openjdk-src-1.7.0.79-2.5.5.1.el6_6.x86_64 3/7
Installing:1:java-1.7.0-openjdk-demo-1.7.0.79-2.5.5.1.el6_6.x86_64 4/7
Installing:1:java-1.7.0-openjdk-devel-1.7.0.79-2.5.5.1.el6_6.x86_64 5/7
Installing:1:java-1.7.0-openjdk-javadoc-1.7.0.79-2.5.5.1.el6_6.noarch 6/7
Erasing:libjpeg-6b-46.el6.x86_64 7/7
Verifying:1:java-1.7.0-openjdk-src-1.7.0.79-2.5.5.1.el6_6.x86_64 1/7
Verifying:1:java-1.7.0-openjdk-1.7.0.79-2.5.5.1.el6_6.x86_64 2/7
Verifying:1:java-1.7.0-openjdk-javadoc-1.7.0.79-2.5.5.1.el6_6.noarch 3/7
Verifying:1:java-1.7.0-openjdk-demo-1.7.0.79-2.5.5.1.el6_6.x86_64 4/7
Verifying:1:java-1.7.0-openjdk-devel-1.7.0.79-2.5.5.1.el6_6.x86_64 5/7
Verifying:libjpeg-turbo-1.2.1-3.el6_5.x86_64 6/7
Verifying:libjpeg-6b-46.el6.x86_64 7/7
Installed:
Java-1.7.0-openjdk.x86_64 1:1.7.0.79-2.5.5.1.el6_6
Java-1.7.0-openjdk-demo.x86_64 1:1.7.0.79-2.5.5.1.el6_6
Java-1.7.0-openjdk-devel.x86_64 1:1.7.0.79-2.5.5.1.el6_6
Java-1.7.0-openjdk-javadoc.noarch 1:1.7.0.79-2.5.5.1.el6_6
Java-1.7.0-openjdk-src.x86_64 1:1.7.0.79-2.5.5.1.el6_6
Libjpeg-turbo.x86_64 0:1.2.1-3.el6_5
Replaced:
Libjpeg.x86_64 0:6b-46.el6
complete!
3. Confirm that the installation is successful
[Root@localhost ~]# Java-version
Java Version "1.7.0_79"
OpenJDK Runtime Environment (rhel-2.5.5.1.el6_6-x86_64 u79-b14)
OpenJDK 64-bit Server VM (build 24.79-b02, Mixed mode)
[Root@localhost ~]# Javac
Usage:javac
Where possible options include:
-G Generate All debugging Info
-g:none Generate No debugging Info
-g:{lines,vars,source} Generate only some debugging info
-nowarn Generate No warnings
-verbose Output messages about what the compiler is doing
-deprecation Output source locations where deprecated APIs are used
-classpath specify where to find user class files and annotation processors
-CP specify where to find user class files and annotation processors
-sourcepath specify where to find input source files
-bootclasspath Override location of bootstrap class files
-extdirs Override location of installed extensions
-endorseddirs Override location of endorsed standards path
-proc:{none,only} Control whether annotation processing and/or compilation is done.
-processor [,, ...] Names of the annotation processors to run; Bypasses default discovery process
-processorpath specify where to find annotation processors
-D specify where to place generated class files
-S specify where to place generated source files
-implicit:{none,class} Specify whether or not to generate class files for implicitly referenced files
-encoding specify character encoding used by source files
-source provide source compatibility with specified release
-target Generate class files for specific VM version
-version Version Information
-help Print A synopsis of standard options
-akey[=value] Options to pass to annotation processors
-X Print A synopsis of nonstandard options
-j Pass directly to the runtime system
-werror Terminate Compilation If warnings occur
@ Read options and filenames from file
[Root@localhost ~]# Java
Usage:java [-options] class [args ...]
(to execute a class)
or Java [-options]-jar jarfile [args ...]
(to execute a jar file)
Where options include:
Load Java programming language agent, see JAVA.LANG.INSTRUMENT-D64 Use a 64-bit data model if avail Able-server to select the ' server ' VM the default VM is SERVER.-CP <class search path of directories and Zip/jar files>-classpath <class search Path of directories and Zip/jar files> a:separated lis T of directories, JAR archives, and ZIP archives to search for class files.-d<name>=<value> Set a system Property-verbose:[class|gc|jni] enable verbose output-version print product version And exit-version:<value> require the specified version to run-showversion print product version and C Ontinue-jre-restrict-search | -no-jre-restrict-search include/exclude User Private JREs in the version search-? -help Print this Help message-x print help on non-standard Options-ea[:<packagename>...|:<classna Me>]-enableassertiOns[:<packagename>...|:<classname>] enable assertions with specified Granularity-da[:<packagen Ame>...|:<classname>]-disableassertions[:<packagename>...|:<classname>] Disable Assertio NS with specified Granularity-esa | -enablesystemassertions Enable System ASSERTIONS-DSA | -disablesystemassertions disable system assertions-agentlib:<libname>[=<options>] Lo Ad native Agent library <libname>, e.g.-agentlib:hprof See also,-agentlib:jdwp=help AND-AGENTLIB:HPR Of=help-agentpath:<pathname>[=<options>] Load native Agent library by full pathname-javaagent:< ; jarpath>[=<options>] Load Java programming language agent, see Java.lang.instrument-splash:<imag Epath> Show splash screen with specified imageSee http://www.oracle.com/technetwork/java/javase/documentation/index.html for more details.
4. JDK installation path by default
/usr/lib/jvm
Since our machine may have several versions of the JDK installed at the same time, there will be a Java link to the specific Java command in the/etc/alternatives directory. And this/etc/alternatives/java will be/usr/bin/java link. The Java command is then set to the shell environment.
Installing the JDK with Yum on Linux
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